HP Xeon E3-1280, Intel® Xeon® E3 Family, LGA 1155 (Socket H2), 32 nm, Box, E3-1280, 3.5 GHz HP Xeon E3-1280. Processor family: Intel® Xeon® E3 Family, Processor socket: LGA 1155 (Socket H2), Processor lithography: 32 nm. Market segment: Desktop, Bandwidth: 21000 MB/s